sudo apt-get install twinkle

sudo apt-get install linphone

import linphone
import logging
import signal
import time

class SecurityCamera:
  def __init__(self, username='', password='', whitelist=[], camera='', snd_capture='', snd_playback=''):
self.quit = False
self.whitelist = whitelist
callbacks = {
  'call_state_changed': self.call_state_changed,
}

# Configure the linphone core
logging.basicConfig(level=logging.INFO)
signal.signal(signal.SIGINT, self.signal_handler)
linphone.set_log_handler(self.log_handler)
self.core = linphone.Core.new(callbacks, None, None)
self.core.max_calls = 1
self.core.echo_cancellation_enabled = False
self.core.video_capture_enabled = True
self.core.video_display_enabled = False
self.core.stun_server = 'stun.linphone.org'
self.core.firewall_policy = linphone.FirewallPolicy.PolicyUseIce
if len(camera):
  self.core.video_device = camera
if len(snd_capture):
  self.core.capture_device = snd_capture
if len(snd_playback):
  self.core.playback_device = snd_playback

# Only enable PCMU and PCMA audio codecs
for codec in self.core.audio_codecs:
  if codec.mime_type == "PCMA" or codec.mime_type == "PCMU":
    self.core.enable_payload_type(codec, True)
  else:
    self.core.enable_payload_type(codec, False)

# Only enable VP8 video codec
for codec in self.core.video_codecs:
  if codec.mime_type == "VP8":
    self.core.enable_payload_type(codec, True)
  else:
    self.core.enable_payload_type(codec, False)

self.configure_sip_account(username, password)

def signal_handler(self, signal, frame):
self.core.terminate_all_calls()
self.quit = True

def log_handler(self, level, msg):
method = getattr(logging, level)
method(msg)

def call_state_changed(self, core, call, state, message):
if state == linphone.CallState.IncomingReceived:
  if call.remote_address.as_string_uri_only() in self.whitelist:
    params = core.create_call_params(call)
    core.accept_call_with_params(call, params)
  else:
    core.decline_call(call, linphone.Reason.Declined)
    chat_room = core.get_chat_room_from_uri(self.whitelist[0])
    msg = chat_room.create_message(call.remote_address_as_string + ' tried to call')
    chat_room.send_chat_message(msg)

def configure_sip_account(self, username, password):
# Configure the SIP account
proxy_cfg = self.core.create_proxy_config()
proxy_cfg.identity = 'sip:{username}@sip.linphone.org'.format(username=username)
proxy_cfg.server_addr = 'sip:sip.linphone.org;transport=tls'
proxy_cfg.register_enabled = True
self.core.add_proxy_config(proxy_cfg)
auth_info = self.core.create_auth_info(username, None, password, None, None, 'sip.linphone.org')
self.core.add_auth_info(auth_info)

def run(self):
while not self.quit:
  self.core.iterate()
  time.sleep(0.03)

def main():
cam = SecurityCamera(username='raspberry', password='pi', whitelist=['sip:trusteduser@sip.linphone.org'], camera='V4L2: /dev/video0', snd_capture='ALSA: USB Device 0x46d:0x825')
cam.run()

main()